Sound technical content, curated with aloha by
Ted Mooney, P.E. RET
Pine Beach, NJ
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for Metal Finishing since 1989
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Poor Surface finish on electropolished parts
2007
Hello All,
We are having a cosmetics finishing problems with an electropolish process and I'd like to have your comments and suggestions about.
We're electropolishing a 304 SS 0.006 and 0.005 thickness metal.
27" x 23" width and high respectively. Actually we're using the next parameters:
Acid solution Temperature is 122 F
Current is 95 Amp
Tension is 3.7 volts
Time is 4 mins
Basically, the surface of the SS metal looks pretty bad. I'd like to know if we are using the correct parameters for this specific process and how can improve the finished?
I really appreciate the help than you can provide me. Thanks in advance.
Best Regards,
Quality Eng - Jalisco, México
Please review the electropolishing chapter of the Electroplating Engineering Handbook [on AbeBooks or eBay or Amazon affil links] as a first step, Alberto, but it sounds like your current is about a tenth of what it needs to be.
Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
2007
Your material is a poor conductor of electricity and is extremely thin for your surface area. (IE: it will not carry the required amperage)It will require multiple points of contact on both the top and bottom and possibly on the sides also.
James Watts- Navarre, Florida
2007
Lower your Amperage and voltage.
Keep stable the pH solution.
Increase T.
Let me know if I still can be help you.
Suerte
- Minneapolis, Minnesota, USA
2007
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